Container closure



Jan. 28, 1936. w E R 2,029,020

' CONTAINER CLOSURE Filed March 1., 1933 Flt-3.1. I y

\NVENTOR' W/LL/AM ERHARD ATTORNEY- 10 sures is the diflicuity 40 passageway through which o drawing accompanying and @atented Jan. 1936 ZMZSNZG @QNTR EILQSURE Erhard, North Bergen,

N. 5., assignor to Globe Collapsible Tube Corporation, Brooklyn, N. I, a corporation of New York I Application March 1, i933, Benal No. 659,132

This invention relates'to closures for containers and has particular he apparentlater on, the of application to containers materials, but as will invention is capable for other purposes.

One cause of dissatisfaction with screw-cloin engaging the threads in the closure with the threads around the container mouth in such a ay that they will take ency not to apply the closure and as a result contamination and deterioration of the container tube the lack of proper a tube or a cap so that scrapped.

alignment may damage either or both has to be the closure into position.

Another object is to provide a .seal for the the material leaves or is removed from the container which will, for a great many container contents, make unnecessary the usual insert of cork or similar material.

With the foregoing and other objects and advantages in view, the invention consists in a. novel construction and relation of parts, the novel features of which are pointed out in the claims, and-one embodiment of which is shown in the forming a part of this specification.

In said drawing: Figure 1 is a section through the neck oi a collapsible tube and a screw cap for the tube showing the parts One object of this invention is to provide a in the relations they assume when the cap is applied to the neck and just before the screw threads engage.

Fig. 2 is a section corresponding to Fig. 1 except that it shows the cap screwed into sealing position.

1 Fig. 3 is a section In the accompanying drawing the various features of the invention are shown in the form they would take when applied to a container of the collapsible tube type. provided with a neck containing the passageway it through which the contents of the tube may he forced. The neck is provided with a thread 32 around its-base, and above the thread is an unthreaded portion 53 forming part of the align- 1 ing feature above referred to. The cap it may be of any external shape and is provided on its interior with threads E5 to engage the threads 92, and an unthreaded portion i6 above the threads l5 to cooperate tion is on the neck. When the cap is first placed on the neck the unthreaded portions I3 and I 6 will engage for a sufflcient part of their lengths to center the cap on the tube neck. This engagement of the unthreaded portions is tele 2 scopic, although the fit is not a close one. The purpose is served by having the unthreaded portions engage for sunicient parts of their lengths, and closely enough, to center the cap on the tube.

to align the two elements, the threads are screwed together in the usual way, the unthreaded portions remaining in telescopic engagement until the cap is screwed home.

The axial alignment of the cap and neck may be facilitated to a certain extent by having the line I l forming the base or the unthreaded portion of the neck extend in a circumferential plane at a right angle to the axis of the neck and 4 intersecting the thread for a major portion oi! the top turn of the thread. This will give a circumferential base for engagement by the lower end of the thread of the cap as distinguished from a helical base if the thread on the neck 4 is not so intersected. This feature is not an essential one, however, as the improved parts will align quite satisfactorily without it.

The interior of the cap is provided with a circular boss I 8 lzavingits sides tapered or inclined 5 in such a way that when the cap is screwed fully home the inclined sides will engage the interior edge of the mouth or opening and eflect a seal. Where the material of the neck is a sort or yield- 6 on the line 3-3 of Fig. l.

The container ill is 10 with the unthreaded por- After the unthreaded portions have engaged ing material the inclined or tapered side of the g boss will engage the 'inner edge of the'passageway l l and form a very tight seal. If, as is usual with collapsible tubes, the material of the neck is a relativelysoft metal the inclined surface of the boss I8 will act upon the metal at the inner edge neck will be expanded by the boss so as to pause v the exterior of the; neck to grip the interior N3 of the cap. This will hold the cap against accidental removal and will also contribute toward the forming of a good seal.

Where the passageway 7 form the boss l8 may be omitted and the usual insert of cork or similar material employed. The aligning feature, however; can be used with en tire satisfaction in such a 'construction.

The unthreaded portionTon the neck should obviously be greater in length than the threaded portion in the cap. while, as above stated, the cooperation of the unthreaded portions on the neck and in the cap is telescopic, this relation need not be maintained after the two threads are engaged. All that isnecessary is to have such a telescopic and aligning relation of the parts efiective until the two threads have at least started their engagengent.

Whileithe embodiment shown in the drawing is; the objects above stated; has therefore been de-;'

well adapted to attain and that embodiment scribed detail it is apparent that the'various; featuresfjof the invention are capable of other embodimentsgarid it is not the desire to be limited by the drawing or description except as such H is non-circular in.

limitations may appear in the claims which follow.

What claim is:

1. In a collapsible container of the screw 010- sure type, a neck around the discharge opening having a screw thread on its exterior and an nnthreaded guiding portion above the thread, a cap having a thread to cooperate with the thread and an unthreaded guiding portion to cooperate with the guiding portion on the neck, said guiding portions engaging telescopically and freely to align the closure and the neck axially before the two threads are engaged in screwing the closure on the neck; and a tapered portion within the top of the closure constructed to en= gage the interior edge of the discharge opening and seal said opening when the screw threads are fully engaged.

2. In a collapsible tube container of the screw cap closure type, a screw cap having on its interior a screw thread, and an unthreaded guiding portion adjacent the thread having an internal diameter the same as or less than the internal diameter at the top of the thread in the cap, a neck around the discharge opening of the tube having aiscrew' thread to engage the thread the cap and an unthreaded guiding portion con structed to engage slidingly with the unthreaded portion in the cap to align the neck and cap axially before the threads engage, and a tapered p01;- tion within the top of the cap constructed to engage the interior edge of the discharge opening and acting to expand the neck against the unthreaded interior of the cap when the cap is screwed home. 7 

